I am looking for a "correct" replacement bearing for a 1963-1964 Type I jack. I bought the jack at a swap meet many years ago and the bearing was missing. According to my notes from the January 1992 Cypress Garden swap meet I measured the bearing on an original 1963 jack. The thrust bearing was stamped "IRWIN BRG. CO. CINC. OHIO" and "H-2 TOP". The width of the bearing measured 3/8" and the circumference of the bearing measured about 4.0" +/- which would make the outside diameter about 1 1/4". Is the "correct" bearing size 1/2" I.D., 1 1/4" O.D., and 3/8" wide? I have found thrust bearings on the web that measure 1/2" I.D., ! 1/8" O.D., and 3/8" wide as well as 1/2" I.D., 1 3/8" O.D., and 7/16" wide.
The 1/2" diameter shaft length on my Type I jack measures 14 3/4" long with the thread length measuring 8 1/2". The available space between the 3/4" hex nut and the pin hole where the 3/8" wide thrust bearing would be located measures about 25/32".
Dave
The 1/2" diameter shaft length on my Type I jack measures 14 3/4" long with the thread length measuring 8 1/2". The available space between the 3/4" hex nut and the pin hole where the 3/8" wide thrust bearing would be located measures about 25/32".
Dave
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